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940 headlight wiring upgrade

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Old Apr 8th, 2024, 18:23   #1
940volvoman
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Default 940 headlight wiring upgrade

I need to upgrade the wiring to my headlights on my 940 Celebration using additional relays fed direct from the battery.

My one concern is the dim/dip circuit which was still an OEM fitment still on my 1998 model.

How would this circuit be affected by interrupting the feed to the headlights via the relay? Would I need a diode?

Anyone else had to do this ??
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Old Apr 9th, 2024, 00:35   #2
Forrest
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The dim/dip lights on a late model 940 are automatically turned on when the headlight switch is in the "off" position via the blue relay "M", second from right, front row of the relay tray.

I guess what you do to manage this depends on whether you want the dim/dip function still to work following your mod and where in the circuit you propose to install your new relays. Also, whether you want the sidelights to come on without the dim/dip headlights (questionable legality) or disable all the lights coming on unless you switch them on.

You can remove fuse 25 to disable daylight running lights on some models.
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Old Apr 10th, 2024, 13:13   #3
SwannyUK
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Quote:
Originally Posted by 940volvoman View Post
I need to upgrade the wiring to my headlights on my 940 Celebration using additional relays fed direct from the battery.

My one concern is the dim/dip circuit which was still an OEM fitment still on my 1998 model.

How would this circuit be affected by interrupting the feed to the headlights via the relay? Would I need a diode?

Anyone else had to do this ??
I've been thinking of getting a direct feed relay set like this;

https://www.ebay.co.uk/itm/166491397033
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Old Apr 10th, 2024, 22:42   #4
940volvoman
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Looks the biz.If it's a 5 pin relay maybe that solves my dim/dip circuit problem....?
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Old Apr 11th, 2024, 09:15   #5
SwannyUK
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Quote:
Originally Posted by 940volvoman View Post
Looks the biz.If it's a 5 pin relay maybe that solves my dim/dip circuit problem....?
I'm sure someone on here's used them before, and explained in great detail which type to get. I thought I had subscribed to the thread, but I cant find it now.
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